Hey, he was a flirt. It was just part of his charming personality and couldn't be helped. John huffed out a laugh at her response and then moved back to the door, vaguely curious. He settled a hand on the wood of it and looked very much like he was just listening for a moment.
"Sometimes doesn't mean every time," he noted. "You run into trouble before, luv?" His expression softened somewhat. "They're nasty fuckers, but I don't expect you'll have to see them again." He had no idea what an Infinity Stone was, but the name of the things said plenty enough.